US7388151B2

US7388151B2 - Bicycle electrical wiring support apparatus

Info

Publication number: US7388151B2
Application number: US10/908,967
Authority: US
Inventors: Naohiro Nishimoto
Original assignee: Shimano Inc
Current assignee: Shimano Inc
Priority date: 2004-07-28
Filing date: 2005-06-02
Publication date: 2008-06-17
Also published as: EP1621455A3; EP1621455B1; JP2006036065A; DE602005005397D1; US20060022425A1; EP1621455A2; TW200606061A; DE602005005397T2; BRPI0501778A; CN1727247A; JP3950875B2

Abstract

A bicycle electrical wiring support apparatus comprises an axially elongated rigid first cover member structured to substantially cover a portion of electrical wiring, and a resilient second cover member that couples to the first cover member for covering a portion of electrical wiring not covered by the first cover member.

Description

BACKGROUND OF THE INVENTION

The present invention is directed to bicycles and, more particularly, to a bicycle electrical wiring apparatus.

Bicycles sometimes are equipped with various electrical devices that are distributed along the bicycle frame and are interconnected through appropriate wiring. Such a bicycle is disclosed in U.S. Pat. No. 6,835,069. It is preferable to secure the wiring to the frame so that the wiring does not hang loose and pose a hazard. One method of securing the wiring to the frame is to pass the wiring through the inside of the frame tubes. Such a method makes it possible to obtain a clean external appearance. However, not only is a special structure required to pass the electrical wiring through the inside of the frame tubes, but passing the electrical wiring through the inside of the frame tubes is time-consuming. The special frame structure and the labor intensive nature of passing the wiring through the frame tubes undesirably increases the cost of the bicycle.

Another method of securing the wiring to the frame is simply to attach the wiring to the bicycle frame with a wiring band. Such a method is easy, thus making it possible to reduce the cost of the wiring operations. However, the wiring still tends to sag in an exposed manner between the wiring bands, so it is impossible to obtain a desirable clean appearance. Furthermore, because the sagging wiring is exposed to the outside, the wiring may become caught with other objects. For example, wiring at the lower part of the bicycle may become snagged with objects on the ground during travel and braking.

SUMMARY OF THE INVENTION

The present invention is directed to various features of a bicycle electrical wiring support apparatus. In one embodiment, a bicycle electrical wiring support apparatus comprises an axially elongated rigid first cover member structured to substantially cover a portion of electrical wiring, and a resilient second cover member that couples to the first cover member for covering a portion of electrical wiring not covered by the first cover member. Additional inventive features will become apparent from the description below, and such features alone or in combination with the above features may form the basis of further inventions as recited in the claims and their equivalents.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a side view of a particular embodiment of a bicycle;

FIG. 2 is a front view of a particular embodiment of components mounted to the bicycle handlebar;

FIG. 3 is a side view of electrical wiring mounted to the bicycle frame;

FIG. 4 is a block diagram of an electrically operated bicycle control system;

FIG. 5 is a front view of a particular embodiment of a first cover member;

FIG. 6 is a view taken along line VI-VI in FIG. 5;

FIG. 7 is a front view of a particular embodiment of a second cover member;

FIG. 8 is a partial cross-sectional view of the second cover member;

FIG. 9 is a partial cross sectional view of another embodiment of a second cover member;

FIG. 10 is a cross sectional view of a particular embodiment of a coupler;

FIG. 11 is a cross sectional view of another embodiment of a coupler; and

FIG. 12 is an oblique view of the support member shown in FIG. 10.

DETAILED DESCRIPTION OF THE EMBODIMENTS

FIG. 1 is a side view of a bicycle 101 that includes particular embodiments of electrically controlled components. Bicycle 101 is a road bicycle comprising a diamond-shaped frame 102, a front fork 98 rotatably mounted to frame 102, a handlebar assembly 104 mounted to the upper part of fork 98, a front wheel 106 f rotatably attached to the lower part of fork 98, a rear wheel 106 r rotatably attached to the rear of frame 102, and a drive unit 105. A front wheel brake 107 f is provided for braking front wheel 106 f, and a rear wheel brake 107 r is provided for braking rear wheel 106 r.

Drive unit

105 comprises a chain 95, a front sprocket assembly 99 f coaxially mounted with a crank 96 having pedals PD, an electrically controlled front derailleur 97 f attached to a seat tube 102 a of frame 102, a rear sprocket assembly 99 r coaxially mounted with rear wheel 106 r, and an electrically controlled rear derailleur 97 r. In this embodiment, front sprocket assembly 99 f comprises two sprockets mounted coaxially with crank 96, and rear sprocket assembly 99 r comprises ten sprockets mounted coaxially with rear wheel 106 r. Front derailleur 97 f moves to two operating positions to switch chain 95 between the two front sprockets, and rear derailleur 97 r moves to ten operating positions to switch chain 95 among selected ones of the ten rear sprockets.

Handlebar assembly

104 comprises a handlebar stem 111 and a drop-style handlebar 112, wherein handlebar stem 111 is mounted to the upper part of fork 98, and handlebar 112 is mounted to the forward end portion of handlebar stem 111. As shown in FIG. 2, brake lever assemblies 113 f and 113 r are mounted at opposite sides of handlebar 112. Brake lever assembly 113 f controls the operation of front wheel brake 107 f, and brake lever assembly 113 r controls the operation of rear wheel brake 107 r. A display unit 120 is detachably mounted to a display unit bracket 120 a attached to a central portion of handlebar 112. Display unit 120 displays the speed of the bicycle, distance traveled, gear position, etc. in a known manner.

Brake lever assemblies

113 f and 113 r comprise

respective brake brackets

115 f and 115 r mounted to the forward curved portions of handlebar 112, and respective brake levers 116 f and 116 r pivotably mounted to

brake brackets

115 f and 115 r. A rear shift control device 121 r with a switch lever 124 is mounted to the rear side of brake lever 116 r so that the rider may control the operation of rear derailleur 97 r with the hand grasping brake lever 116 r. The switch lever 124 mounted to the rear of brake lever 116 r rotates laterally inward from a home position P0 to a first position P1 and rotates laterally outward from home position P0 to a second position P2 to control the operation of rear derailleur 97 r. Similarly, a front shift control device 121 f with a switch lever 124 is mounted to the rear side of brake lever 116 f so that the rider may control the operation of front derailleur 97 f with the hand grasping brake lever 116 f. The switch lever 124 mounted to the rear of brake lever 116 f also rotates laterally inward from a home position P0 to a first position P1 and rotates laterally outward from home position P0 to a second position P2 to control the operation of front derailleur 97 f. The levers 124 in front shift control device 121 f and rear shift control device 121 r are biased to their respective home positions P0.

A front upshift switch 130 f (FIG. 4) and a front downshift switch 131 f are mounted in front shift control device 121 f. Front upshift switch 130 f operates when switch lever 124 in front shift control device 121 f rotates from position P0 to position P1, and front downshift switch 131 f operates when switch lever 124 in front shift control device 121 f rotates from position P0 to position P2. Similarly, a rear upshift switch 130 r and a rear downshift switch 131 r are mounted in rear shift control device 121 r. Rear upshift switch 130 r operates when switch lever 125 in rear shift control device 121 r rotates from position P0 to position P1, and rear downshift switch 131 r operates when switch lever 124 in rear shift control device 121 r rotates from position P0 to position P2. Of course, many different switch combinations that operate in many different ways may be provided to suit different applications.

As shown in FIG. 4, front derailleur 97 f comprises a front derailleur motor 125 f, a front motor drive component 126 f for driving front derailleur motor 125 f, a front shift controller 127 f comprising a programmed microprocessor and other electronic components for controlling the position of front derailleur 97 f in response to signals received from front shift control device 121 f, and a front position sensor 128 f that senses the operating position of front derailleur 97 f. Similarly, rear derailleur 97 r comprises a rear derailleur motor 125 r, a rear motor drive component 126 r for driving rear derailleur motor 125 r, a rear shift controller 127 r comprising a programmed microprocessor and other electronic components for controlling the positioning of rear derailleur 97 r in response to signals received from rear shift control device 121 r, and a rear position sensor 128 r that senses the operating position of rear derailleur 97 r. A power source 199 a in the form of a primary or secondary battery or some other power source is housed in a battery case 129 attached to the bottom bracket 102 b (FIG. 3) of frame 102. Power source 129 a powers front and

rear derailleurs

97 f and 97 r as well as other electrical components described herein in a known manner.

As shown in FIGS. 1-4, front and

rear derailleurs

97 f and 97 r, front and rear

shift control devices

121 f and 121 r, display unit 120 and battery case 129 are mounted at various positions on bicycle 101 and are interconnected by five electrical wire assemblies EW1-EW5. Electrical wire assembly EW1 extends from rear shift control device 121 r to front shift control device 121 f, electrical wire assembly EW2 extends from front shift control device 121 f to battery case 129, electrical wire assembly EW3 extends from battery case 129 to front derailleur 97 f, electrical wire assembly EW4 extends from battery case 129 to rear derailleur 97 r, and electrical wire assembly EW5 extends from front shift control device 121 f to display unit bracket 120 a.

In this embodiment, electrical wire assembly EW1 carries shift control signals from rear shift control device 121 r and may comprise a three wire cable that may be partially taped to handlebar 112. Electrical wire assembly EW2 carries shift control signals from front shift control device 121 f and rear shift control device 121 r as well as the operating position signals from front position sensor 128 f and rear position sensor 128 r. Electrical wire assembly EW2 may comprise a five or six wire cable. The portion of electrical wire assembly EW2 in proximity to front brake lever assembly 113 f may be partially taped to handlebar 112. Electrical wire assembly EW3 carries shift control signals from front shift control device 121 f and front derailleur position signals from front position sensor 128 f. Similarly, electrical wire assembly EW4 carries shift control signals from rear shift control device 121 r and rear derailleur position signals from rear position sensor 128 r. Each electrical wire assembly EW3 and EW4 may comprise a four wire cable. Electrical wire assembly EW5 carries front and rear derailleur position signals from front and

rear position sensors

128 f and 128 r. Electrical wire assembly EW5 may comprise a five or six wire cable that may be partially taped to handlebar 112. Display unit 120 uses the signals received on electrical wire assembly EW5 to display the current operating position of front derailleur 97 f and rear derailleur 97 r to the rider.

FIG. 3 is a side view of electrical wire assemblies EW2-EW4 mounted to frame 102 using an overall electrical wiring support structure 10. In this embodiment, electrical wire assembly EW2 is supported to a down tube 102 c of frame 102 by a straight rigid first cover member 11 a, a flexible and relatively soft second cover member 12 a, and a first coupler 15, wherein a lower end portion of first cover member 11 a is inserted into battery case 129. Electrical wire assembly EW3 is supported to seat tube 102 a of frame 102 by a straight rigid first cover member 11 b, a flexible and relatively soft second cover member 12 b, and a front derailleur bracket 97 fb, wherein a lower end portion of first cover member 11 b is inserted into battery case 129. Electrical wire assembly EW4 is supported to a chain stay 102 d of frame 102 by a straight rigid first cover member 11 c, a flexible and relatively soft second cover member 12 c, and a second coupler 16, wherein a forward end portion of first cover member 11 c is inserted into battery case 129.

First cover members 11 a-11 c may be fabricated from a hard, relatively resilient, break-resistant material such as polyacetal resin. As shown in FIGS. 5 and 6, each first cover member 11 a-11 c has a generally cylindrical tubular shape and has a slot 11 d extending along its entire length. As a result, each first cover member 11 a-11 c has a substantially C-shaped cross-section. Electrical wire assemblies EW2-EW4 are supported within and substantially covered by their respective first cover members 11 a-11 c.

Each second cover member 12 a-12 c may be fabricated from a flexible and soft material such as a rubber synthetic resin. In this embodiment,

second cover members

12 a and 12 c have the same construction. As shown in FIGS. 7 and 8, each

second cover member

12 a and 12 c comprises a substantially cylindrical tubular attachment part 12 d and a substantially cylindrical tubular extension part 12 e. Attachment part 12 d is structured to elastically attach around an end of its corresponding

first cover member

11 a and 11 c, and extension part 12 e extends from attachment part 12 d. A diameter of extension part 12 e is less than a diameter of attachment part 12 d. Electrical wire assemblies EW2 and EW4 are supported within and covered by their respective

second cover members

12 a and 12 c.

Second cover member

12 b also may be fabricated from a flexible and soft material, but it has a slightly different shape from

second cover members

12 a and 12 c. As shown in FIG. 9, second cover member 12 b comprises a substantially cylindrical tubular attachment part 12 d and a substantially cylindrical tubular extension part 12 e, wherein a diameter of extension part 12 e is less than a diameter of attachment part 12 d as in the first embodiment. However, in this embodiment, an undulating extension part 12 f extends from attachment part 12 d between attachment part 12 d and extension part 12 e. Electrical wire assembly EW3 is supported within and covered by second cover member 12 b.

As shown in FIG. 3, the upper portion of first cover member 11 a, which covers electrical wire assembly EW2, is attached to down tube 102 c by first coupler 15. As shown in FIG. 10, first coupler 15 is attached to down tube 102 c by a fastening bolt 14 that mates with a fastening nut 13 that extends through down tube 102 c. First coupler 15 has the shape of a truncated square pyramid that widens towards the base, wherein the bottom surface of the base follows the curved surface of down tube 102 c. First coupler 15 has a hollow portion that houses fastening nut 13 therein. A U-shaped attachment portion 15 a is disposed at the bottom of first coupler 15 and elastically engages first cover member 15 a.

As shown in FIG. 3, the rear portion of first cover member 11 c, which covers electrical wire assembly EW4, is attached to chain stay 102 d by second coupler 16. Second coupler 16 is detachably fitted in a cable terminating component 20 ordinarily used for terminating the outer casing of a conventional Bowden cable. As shown in FIG. 11, second coupler 16 comprises a support member 21 for supporting first cover member 11 c, a resilient taper ring 22 for attaching support member 21 to cable terminating component 20, a taper nut 23 that contacts the tapered surface of taper ring 22, and a fastener bolt 24. Fastener bolt 24 passes through support member 21 and taper ring 22 and screws into taper nut 23. When fastener bolt 24 is screwed into taper nut 23, taper ring 22 expands radially outward to secure second coupler 16 to cable terminating component 20, thereby attaching first cover member 11 c to chain stay 102 d.

Support member

21 may be fabricated from a relatively soft synthetic resin such as polypropylene, for example, that is folded to produce the structure shown in FIG. 11. FIG. 12 shows support member 21 in its unfolded state. As shown in FIGS. 11 and 12, support member 21 comprises a central folding portion 25, a first portion 26 that forms a first cover member opening 26 a, and a second portion 27 that forms a fastener opening 27 a for receiving fastener bolt 24 therethrough. In this embodiment, a diameter of first cover member opening 26 a is less than a diameter of first fastener opening 27 a. Also, the diameter of first cover member opening 26 a is slightly smaller than a diameter of first cover member 11 c to firmly hold first cover member 11 c.

First portion

26 comprises a first segment 26 b and a second segment 26 c, wherein first segment 26 b folds relative to second segment 26 c about central folding portion 25 to form first cover member opening 26 a. First and

second segments

26 b and 26 c have respective first and second

concave surfaces

26 d and 26 e that face each other when support member 21 is in the folded state to form first cover member opening 26 a. Second portion 27 comprises a first segment 27 b and a second segment 27 c, wherein first segment 27 b folds relative to second segment 27 c about central folding portion 25 to form first fastener opening 27 a. First and

second segments

27 b and 27 c have respective

circular openings

27 d and 27 e formed therein. First and

second segments

27 b and 27 c are disposed axially adjacent to each other when support member 21 is in the folded state so that

openings

27 d and 27 e are aligned with each other to form first fastener opening 27 a.

During operation of the bicycle, when front derailleur 97 f is in the low-speed position, operating front shift control device 121 f to turn on front upshift switch 130 f causes an upshift signal to be communicated to battery case 129 through electrical wire assembly EW2 and then to front derailleur 97 f through electrical wire assembly EW3. Front shift controller 127 f then provides signals to front derailleur motor drive component 126 f to drive front derailleur motor 125 f to move front derailleur 97 f to the high speed position. Similarly, when front derailleur 97 f is in the high-speed position, operating front shift control device 121 f to turn on front downshift switch 131 f causes a downshift signal to be communicated to front derailleur 97 f through electrical wire assemblies EW2 and EW3. Front shift controller 127 f then provides signals to front derailleur motor drive component 126 f to drive front derailleur motor 125 f to move front derailleur 97 f to the low speed position.

When rear derailleur 97 r is in a lower-speed position, operating rear shift control device 121 r to turn on rear upshift switch 130 r causes an upshift signal to be communicated to battery case 129 through electrical wire assemblies EW1 and EW2 and then to rear derailleur 97 f through electrical wire assembly EW4. Rear shift controller 127 r then provides signals to rear derailleur motor drive component 126 r to drive rear derailleur motor 125 r to move rear derailleur 97 r to a higher speed position. Similarly, when rear derailleur 97 r is in a higher speed position, operating rear shift control device 121 r to turn on rear downshift switch 131 r causes a downshift signal to be communicated to rear derailleur 97 r through electrical wire assemblies EW1, EW2 and EW4. Rear shift controller 127 r then provides signals to rear derailleur motor drive component 126 r to drive rear derailleur motor 125 r to move rear derailleur 97 r to a lower speed position.

During the above operations, operating position signals from front and

rear position sensors

128 f and 128 r are communicated to display unit 120 through electrical wire assemblies EW2-EW5 as appropriate, and display unit 120 displays the current operating positions of front and

rear derailleurs

97 f and 97 r.

It should be readily apparent from the above description that electrical wire assemblies EW2-EW4 are disposed in a straight line along frame 102 by the rigid first cover members 11 a-11 c. The parts of electrical wire assemblies EW2-EW4 that do not go along the frame 102 can be bent freely by the soft second cover members 12 a-12 c. As a result, electrical wire assemblies EW2-EW4 do not sag and are not exposed to the outside, thus minimizing any reduction in visual appeal of the bicycle and minimizing risk of damage to the wires.

While the above is a description of various embodiments of inventive features, further modifications may be employed without departing from the spirit and scope of the present invention. For example, while a slot 11 d extended axially along the entire length of the first cover members 11 a-11 c, slot 11 d may be formed along only a portion of the length of first cover members 11 a-11 c. While first cover members 11 a-11 c were formed from a polyacetal resin, which is hard and tough, other materials may be used, such as metal or a carbon fiber reinforced resin. While second cover members 12 a-12 c were formed from a rubber synthetic resin, which is soft and flexible, other materials may be used, such as polyethylene and polypropylene. The size, shape, location or orientation of the various components may be changed as desired. Components that are shown directly connected or contacting each other may have intermediate structures disposed between them. The functions of one element may be performed by two, and vice versa. The structures and functions of one embodiment may be adopted in another embodiment. It is not necessary for all advantages to be present in a particular embodiment at the same time. Every feature which is unique from the prior art, alone or in combination with other features, also should be considered a separate description of further inventions by the applicant, including the structural and/or functional concepts embodied by such feature(s). Thus, the scope of the invention should not be limited by the specific structures disclosed or the apparent initial focus or emphasis on a particular structure or feature.

Claims

1. A bicycle electrical wiring support apparatus comprising:

an axially elongated rigid first cover member structured to substantially cover a portion of electrical wiring;

wherein the first cover member includes an axially extending slot; and

a resilient second cover member that couples to the first cover member for covering a portion of electrical wiring not covered by the first cover member;

wherein at least a portion of the second cover member has a continuous circumferential side wall for completely surrounding the electrical wiring.

2. The apparatus according to claim 1 wherein the first cover member has a substantially cylindrical shape.

3. The apparatus according to claim 1 wherein a portion of the first cover member has a substantially C-shaped cross section.

4. The apparatus according to claim 1 wherein the slot extends a majority of an entire length of the first cover member.

5. The apparatus according to claim 4 wherein the slot extends the entire length of the first cover member.

6. The apparatus according to claim 5 wherein the first cover member has a substantially C-shaped cross section.

7. The apparatus according to claim 1 wherein the first cover member is substantially straight for substantially its entire length.

8. The apparatus according to claim 1 wherein the second cover member comprises:

a substantially cylindrical attachment part structured to attach to an end of the first cover member; and

an undulating extension part extending from the attachment part.

9. The apparatus according to claim 1 wherein the second cover member comprises:

a substantially cylindrical extension part extending from the attachment part;

wherein a diameter of the extension part is less than a diameter of the attachment part.

10. The apparatus according to claim 1 further comprising a coupler that couples the first cover member to a bicycle frame.

11. The apparatus according to claim 10 wherein the coupler comprises a first portion that forms a first cover member opening to support the first cover member.

12. The apparatus according to claim 11 wherein the first portion comprises a first segment and a second segment, wherein the first segment folds relative to the second segment to form the first cover member opening.

13. The apparatus according to claim 12 wherein the first segment faces the second segment to form the first cover member opening.

14. The apparatus according to claim 12 wherein the first segment comprises a first concave surface, wherein the second segment comprises a second concave surface, and wherein the first and second concave surfaces face in opposite directions to form the first cover member opening.

15. The apparatus according to claim 14 wherein the first concave surface faces the second concave surface to form the first cover member opening.

16. The apparatus according to claim 11 wherein the coupler comprises a second portion that forms a fastener opening to receive a fastener therethrough to attach the coupler to the bicycle frame.

17. The apparatus according to claim 16 wherein the second portion comprises a first segment and a second segment, wherein the first segment folds relative to the second segment to form the fastener opening.

18. The apparatus according to claim 17 wherein the first segment is positioned axially adjacent to the second segment to form the fastener opening.